{"api_version":"1","generated_at":"2026-10-03T03:41:34+00:00","cve":"CVE-2026-90157","urls":{"html":"https://cve.report/CVE-2026-90157","api":"https://cve.report/api/cve/CVE-2026-90157.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90157","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90157"},"summary":{"title":"bpf: Reject negative optlen in cgroup getsockopt hook","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject negative optlen in cgroup getsockopt hook\n\nA cgroup getsockopt BPF program can shrink ctx->optlen after the\nkernel getsockopt handler has run. The kernel-buffer variant, used by\nTCP_ZEROCOPY_RECEIVE, only rejects values larger than the original\nlength.\n\nIf BPF writes a negative optlen, that value is accepted and propagated\nback to the TCP getsockopt code. It can then be passed to\ncopy_to_sockptr() as a size_t and trigger the hardened usercopy\nbytes > INT_MAX warning.\n\nReject negative ctx.optlen in __cgroup_bpf_run_filter_getsockopt_kern(),\nmatching the lower-bound validation already present in the sockptr-based\ngetsockopt hook.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:08","updated_at":"2026-09-17 17:17:08"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/31a89af4f513d750fec196e2bb6195a7d4473e9f","name":"https://git.kernel.org/stable/c/31a89af4f513d750fec196e2bb6195a7d4473e9f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f68671b1a98d426c57864bd457c125fee14ac1a5","name":"https://git.kernel.org/stable/c/f68671b1a98d426c57864bd457c125fee14ac1a5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1b5aacd5b2419b0790e955e466d389a61c79b4b1","name":"https://git.kernel.org/stable/c/1b5aacd5b2419b0790e955e466d389a61c79b4b1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2bdbe00454200fcb0110f31eeca8d906a3515e74","name":"https://git.kernel.org/stable/c/2bdbe00454200fcb0110f31eeca8d906a3515e74","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5b09d984b38b018b123c3a9e02a96bbc6468dbe5","name":"https://git.kernel.org/stable/c/5b09d984b38b018b123c3a9e02a96bbc6468dbe5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d02a12b4085ffe41ea750b1007f7a9c7aee2875a","name":"https://git.kernel.org/stable/c/d02a12b4085ffe41ea750b1007f7a9c7aee2875a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e6fbf0eba87f50084d67508898f6ad6fc7ff1ba2","name":"https://git.kernel.org/stable/c/e6fbf0eba87f50084d67508898f6ad6fc7ff1ba2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/554ba7195c4108726450e24480c8449990c2268c","name":"https://git.kernel.org/stable/c/554ba7195c4108726450e24480c8449990c2268c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90157","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90157","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 08f61a34913558e06576e7b6318bf583f273c1be 5b09d984b38b018b123c3a9e02a96bbc6468dbe5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9cacf81f8161111db25f98e78a7a0e32ae142b3f 554ba7195c4108726450e24480c8449990c2268c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9cacf81f8161111db25f98e78a7a0e32ae142b3f d02a12b4085ffe41ea750b1007f7a9c7aee2875a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9cacf81f8161111db25f98e78a7a0e32ae142b3f e6fbf0eba87f50084d67508898f6ad6fc7ff1ba2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.270 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/bpf/cgroup.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5b09d984b38b018b123c3a9e02a96bbc6468dbe5","status":"affected","version":"08f61a34913558e06576e7b6318bf583f273c1be","versionType":"git"},{"lessThan":"554ba7195c4108726450e24480c8449990c2268c","status":"affected","version":"9cacf81f8161111db25f98e78a7a0e32ae142b3f","versionType":"git"},{"lessThan":"d02a12b4085ffe41ea750b1007f7a9c7aee2875a","status":"affected","version":"9cacf81f8161111db25f98e78a7a0e32ae142b3f","versionType":"git"},{"lessThan":"e6fbf0eba87f50084d67508898f6ad6fc7ff1ba2","status":"affected","version":"9cacf81f8161111db25f98e78a7a0e32ae142b3f","versionType":"git"},{"lessThan":"f68671b1a98d426c57864bd457c125fee14ac1a5","status":"affected","version":"9cacf81f8161111db25f98e78a7a0e32ae142b3f","versionType":"git"},{"lessThan":"2bdbe00454200fcb0110f31eeca8d906a3515e74","status":"affected","version":"9cacf81f8161111db25f98e78a7a0e32ae142b3f","versionType":"git"},{"lessThan":"31a89af4f513d750fec196e2bb6195a7d4473e9f","status":"affected","version":"9cacf81f8161111db25f98e78a7a0e32ae142b3f","versionType":"git"},{"lessThan":"1b5aacd5b2419b0790e955e466d389a61c79b4b1","status":"affected","version":"9cacf81f8161111db25f98e78a7a0e32ae142b3f","versionType":"git"},{"lessThan":"5.10.270","status":"affected","version":"5.10.188","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/bpf/cgroup.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.12"},{"lessThan":"5.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"5.10.188","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"5.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject negative optlen in cgroup getsockopt hook\n\nA cgroup getsockopt BPF program can shrink ctx->optlen after the\nkernel getsockopt handler has run. The kernel-buffer variant, used by\nTCP_ZEROCOPY_RECEIVE, only rejects values larger than the original\nlength.\n\nIf BPF writes a negative optlen, that value is accepted and propagated\nback to the TCP getsockopt code. It can then be passed to\ncopy_to_sockptr() as a size_t and trigger the hardened usercopy\nbytes > INT_MAX warning.\n\nReject negative ctx.optlen in __cgroup_bpf_run_filter_getsockopt_kern(),\nmatching the lower-bound validation already present in the sockptr-based\ngetsockopt hook."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:06:49.081Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/5b09d984b38b018b123c3a9e02a96bbc6468dbe5"},{"url":"https://git.kernel.org/stable/c/554ba7195c4108726450e24480c8449990c2268c"},{"url":"https://git.kernel.org/stable/c/d02a12b4085ffe41ea750b1007f7a9c7aee2875a"},{"url":"https://git.kernel.org/stable/c/e6fbf0eba87f50084d67508898f6ad6fc7ff1ba2"},{"url":"https://git.kernel.org/stable/c/f68671b1a98d426c57864bd457c125fee14ac1a5"},{"url":"https://git.kernel.org/stable/c/2bdbe00454200fcb0110f31eeca8d906a3515e74"},{"url":"https://git.kernel.org/stable/c/31a89af4f513d750fec196e2bb6195a7d4473e9f"},{"url":"https://git.kernel.org/stable/c/1b5aacd5b2419b0790e955e466d389a61c79b4b1"}],"title":"bpf: Reject negative optlen in cgroup getsockopt hook","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90157","datePublished":"2026-09-17T16:06:49.081Z","dateReserved":"2026-09-11T19:38:34.790Z","dateUpdated":"2026-09-17T16:06:49.081Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:08","lastModifiedDate":"2026-09-17 17:17:08","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90157","Ordinal":"1","Title":"bpf: Reject negative optlen in cgroup getsockopt hook","CVE":"CVE-2026-90157","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90157","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject negative optlen in cgroup getsockopt hook\n\nA cgroup getsockopt BPF program can shrink ctx->optlen after the\nkernel getsockopt handler has run. The kernel-buffer variant, used by\nTCP_ZEROCOPY_RECEIVE, only rejects values larger than the original\nlength.\n\nIf BPF writes a negative optlen, that value is accepted and propagated\nback to the TCP getsockopt code. It can then be passed to\ncopy_to_sockptr() as a size_t and trigger the hardened usercopy\nbytes > INT_MAX warning.\n\nReject negative ctx.optlen in __cgroup_bpf_run_filter_getsockopt_kern(),\nmatching the lower-bound validation already present in the sockptr-based\ngetsockopt hook.","Type":"Description","Title":"bpf: Reject negative optlen in cgroup getsockopt hook"}]}}}